MR. CARL MATTHEW LEWENHAUPT ACNPC - AG
NPI 1851012264
Nurse Practitioner - Acute Care in Boston, MA
About Mr. Carl Matthew Lewenhaupt Acnpc - Ag NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. CARL MATTHEW LEWENHAUPT ACNPC - AG (NPI 1851012264) is an individual acute care provider in Boston, Massachusetts, licensed in Massachusetts (RN2348097) and active in the NPI registry since September 2022. He is enrolled in Medicare PECOS and is a graduate of Other (2022).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mr. Carl Matthew Lewenhaupt Acnpc - Ag is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Carl Lewenhaupt reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02118
- Reassigned Medicare billing, Massachusetts enrollment
- Medicare enrollment name: Bostons Community Medical Group Inc
- 50 clinicians in this Medicare group
Boston, MA 02118
- Reassigned Medicare billing, Massachusetts enrollment
- 49 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Bristol, RI 02809
- Reassigned Medicare billing, Massachusetts enrollment
- 48 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02118 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Carl Lewenhaupt's NPI number?
The NPI number for Carl Lewenhaupt is 1851012264. It was assigned to this individual provider in the NPPES registry on September 6, 2022.
Where is Carl Lewenhaupt located?
Carl Lewenhaupt practices at 30 Northampton St, Boston, MA 02118. The listed phone number is (617) 433-9601.
What is Carl Lewenhaupt's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Carl Lewenhaupt enrolled in Medicare?
Yes. Carl Lewenhaupt is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Carl Lewenhaupt's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Carl Lewenhaupt reassigns Medicare benefits to 5 organizations: Boston's Community Medical Group, Inc. (Boston, MA), Commonwealth Clinical Alliance, Inc (Boston, MA), The General Hospital Corporation (Boston, MA), Massachusetts General Physicians Organization Inc (Boston, MA) and Infinite Medical PC (Bristol, RI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Carl Lewenhaupt's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Carl Lewenhaupt was last updated on July 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mr. Carl Matthew Lewenhaupt, ACNPC - AG · NPI 1851012264
Acute Care physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since September 6, 2022.
## Identity
- **NPI:** 1851012264 (Entity type: Individual)
- **Enumerated:** September 6, 2022
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** RN2348097 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 30 NORTHAMPTON ST, Boston, MA 02118-4098
- **Phone:** (617) 433-9601
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Boston's Community Medical Group, Inc. (NPI 1235174418, Boston, MA); Commonwealth Clinical Alliance, Inc (NPI 1679605091, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); Infinite Medical PC (NPI 1407483175, Bristol, RI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** July 24, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1851012264) · Data from the CMS NPPES public registry.